For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningTire Pressure Monitor System
The Tire Pressure Monitor System (TPMS) uses radio and sensor technology to check
tire pressure levels. The TPMS sensors monitor the air pressure in your tires and
transmit tire pressure readings to a receiver located in the vehicle.
Each tire, including the spare (if provided), should be check ...
Exterior Care
Washing the Vehicle
To preserve the vehicle's finish, wash it often and out of direct sunlight.
Notice: Do not use petroleum-based, acidic, or abrasive cleaning agents
as they can damage the vehicle's paint, metal, or plastic parts.
If damage occurs, it would not be covered by the vehic ...
Instrument Panel Wiring Harness Replacement
Removal Procedure
Remove instrument panel compartment assembly. Refer to Instrument
Panel Compartment Replacement.
Remove instrument panel wiring harness (2) from instrument panel tie bar
(1).
Disconnect electrical connectors.
Installation Procedure
Ins ...